On its very own "Windows Phone 8 Update History" page, Microsoft has unveiled what the upcoming GDR2 (General Distribution Release 2) for Windows Phone 8 is expected to contain and the list isn't as long as some of us might have hoped but anyway, it's featuring some important improvements. According to the info, the update is either called 8.0.10327.77 or 8.0.10328.78 (I expect this is country, device and carrier dependent) and includes improvements for Xbox Music. According to Microsoft the update makes it easier now to select, download and pin music. Plus, music fans will see more accurate metadata (such as song and album information) and many other performance improvements.
Also music related is the FM radio update which puts the FM radio into the Music-Videos hub and allows to listen to FM radio stations right from there (but Microsoft noted that this feature isn't available for all phones). Another important update is Data Sense. It allows to stay on top of the phone's data usage and users can set a limit based on the respective data plan. Or it just helps to keep track of which apps use the most data (this feature is also not for all phones since not all mobile operators offer Data Sense). Voice over Internet Protocol (VoIP) apps like Lync and Skype will feature improved stability and performance like the Internet Explorer which is said to become better than ever with improved HTML 5 compatibility. Last but not least, the camera gets an update which allows to set the favorite Lens so it opens automatically when the camera button is pressed (also not available for all phones). Furthermore, GDR2 includes many other improvements to Windows Phone, Microsoft hasn't detailed.
Over at The Verge it's also reported, that the GDR2 update will also contain support for CardDAV and CalDAV which is important after Google shut down Exchange Active Sync (EAS) for Gmail and its related service like Calendar and Contacts. However, if the Windows Phone 8 GDR2 update is really featuring CardDAV and CalDAV (which are both still not supported in in Windows Phone 8.1), it means Windows Phone 8 users could possibly leave Outlook.com again and turn back to Gmail as the single source of data.
Microsoft hasn't provided an update schedule but if the info is now available on the company's very own Windows Phone support page, it shouldn't take too long anymore.
Cheers ~ Arne